Type-writing machine.



N. H. ANDERSON.

TYPE WRITING MACHINE APPLICATION man ocr. n, 1913.

Patentfl M1230, 1918.

3 SHEE TSSHEET 1.

-.N. H. ANDERSON.

TYPE WRITING MACHINE.

APPLICATION FILED on. n. ma.

Patenwd Apr, 3Q, 191%.

3 SHEETS-SHEET 3- N. H. ANDERSON.

TYPE WRITING MACHINE. MPucAnou man um. n. 1913.

Patented Am. 30.. 19M.

3 SHEETS-SHEET 3.

wmwooeo ran erm ne serene union NILS H. ANDERSON, 0F MIDDLETOWN, CONNECTICUT, ASSIGNOR T0 'IHlil NOISELESS 'lYPEWRITER COMPANY, OF MIDDLETOWN, CONNECTICUT, A CORPORATION OF oonnsc'rrcnr.

.TYPE-WBITING MAGHINE.

menace.

Specification of Letters Patent.

Patented a so, an,

Application filed Dctober 11, 1913. Serial No. 794,594.

, anism and associated and eoacting parts for controlling the step-by-step or letter-spacmg movement of the carriage.

One of the ob'ects of the present IIIVGD tion is to prov1de a simple and practical universal bar mechanism characterized by its'lightness and ease of movement, yet

type action and the escapement mechanism for permitting rapid and accurate operations. Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, wherein is shown one of the various possible embodiments of the invention,-

Figure 1 is an elevational view showing such parts of a typewriting machine as are necessary to understand one embodiment or application of the present invention thereto;

Figs.- 2 and 3 are detail views of the universal bar mechanism in an intermediate and the final position, respectively, assumed during the printing operation; and

Fig. 1 is a plan View, partly in section, showing the manner of supporting the uni versal bar.

Similar reference characters refer to siiinilar parts throughout the variousviews of the drawings.

Conducive to a clearer understanding of the present invention, there is illustrated in Fig. 1 such portions of a complete type action as are necessary to understand the relationship between the type action and the universal bar mechanism. This type action, which forms the subject-matter of a separate application filed by me August 6, 1913, Serial No. 783,331, forms no part of the present invention except in so far as certain features thereof may enterinto cer tain. combinations hereinafter set forth in the claims. This type action comprises in brief a straight-thrust type carrier 1 adapted to enact with a fiat platen 2 adjacent the platen roller 3. The type carrier is moved. from. a key 4 mounted adjacent the keyboard of the machine and connected with the type carrier 1 through a key lever 5 provided with a vertically disposed pull wire 6 connected at its opposite end to a pivotally mounted lever 7 adapted to have a rocking or heel and toe action upon one arm of a bell crank lever 8. This bell crank lever, which is of the duplex type, is provided with an upwardly extending arm 9 between the parts of which is pivoted a momentum accumulator lever 10v carrying a weight 11 at one end and having its opposite end 12 pivotally connected to a lateral projection of a duplex link 13. One end 14 of the link 13 is pivotally mounted upon an adjustable bracket 15 which may be moved toward and from the printing; point under the action. of an adjusting screw 16. The opposite end 17 of the link 13 is pivotally connected with a duplex link 18 straddling the type carrier 1, and pivoted at 19 to'a central portion thereof. It will thus be seen that as the key- 1 is depressed the pull wire 6 will be moved the arm 8 of the bell crank lever. This will cause the upper end of the arm 9 to swing rearward, and the acquired momentum'of the movable weight will straighten the toggle formed by the links 13 and 18,

thereby positively moving the type silently into contact .with the platen, and exerting a compressive or squeezing action thereon in'fcontradistinction to the usual impact or blow characteristic of most forms of type- 1 writing. machines. *As the toggle formed by the levers 13 and 18 assumes extended position, a reverse toggle will be formed by -the arm 9 of the bell crank lever andthe right-v handportion of the accumulator lever 10.

At the same time the parts move into printing position under normal operation,

the accumulator lever 10 having acquired the momentum as above stated also carries the levers 7 and 8 out of contact after an arm 20 of the key lever 5 has engaged a silencing stop 21. The spring 22 intermediate the arm 8 and the upper part of the bracket 15 will immediately tend to bring the levers 7 and 8 back into contact regardless of subsequent movement -or release of the key lever 5. As the key 4 is released, however, the spring 22, as well as the spring 23 connected with the rear end of the key lever will complete the return movement of the parts to normal position. A pad 24 is .designed to arrest silently the return movement of the momentum accumulator weight while a pad 25 supported from vertically -35 adjustable studs 26 (only one being shown? coacts with a projection 27 of the bell crant lever' for silently arresting its actuating movement.

It is believed from the above description that the general construction and operation of the type action as a whole is clear, and a further more detailed statement thereof 1s unnecessary. 1

Instead of positioning the universal bar mechanism beneath the key levers, as is done in many forms of typewriting machines, it

actuating keys.

1s, in the present case, directly associated with certain movable parts of the type action, in order to obtain a more rapid and accurate operation of the escapement mechanism, regardless of the character ofthe levers are therefore correspondingly arranged, and in order that the umversal bar may have the same rel??? bolts or screws 36 pass into the tapped-out studs 37 supported from any convenient part of the frame of the machine. These studs, only one of which is shown in .Fig. 1, are similar to the stud 26 immediately thereabove supporting the silencer pad 25. The arms 33 being of the same length or effective swinging radius tend to insure an equal vertical movement of all portions of the universal bar.

Projecting downward from each end of the universal bar is a leg 38 and from .the central part, a diagonally disposed and rearwardly extending leg 10. The lower ends of these legs 38 and 40 are pivotally connected by means of pivoted screws, or the like, to the rear end of levers 41, the opposite ends of which are secured by means of straps 42 to a universal rock shaft 43 pivotally mounted in adjustable trunnions 44 at the ends thereof, the trunnions being supported from any convenient part of the frame of the machine and held in place by check nuts 45. Extending downward from the central or middle part of the universal rock shaft is an arm 46 forming, with the arms 41, a bell crank lever. The lower end of the arm 46 is pivotally connected in any desired manner with a sheet metal connecting rod 47. This connecting rod is provided with a threaded sheet metal connection 48 at its rear end to a pull wire 50 extending rearwardly to an escapementrocker 51 carrying escapement mechanism coacting with the escapement wheel or rack 52. This escapement rack is, of course, connected with the platen carriage in the usual and well known manner to accomplish a letter-spacing movement thereof.

The connecting rod 47 is provided, at its front end, with a self-locking adjusting nut 53 carrying a pad 54 adapted to engage the front side of a comb member 55 for guiding the up and down movement of the key levers. This adjustable lock nut and pad are adapted to arrest silently the rearward movement of the connecting rod 47 as the parts return to normal position after each depression of a key lever, or as when moving from position shown in Fig. 3 to that shown in Fig. 1. By moving this nut 53 the initial position of the universal bar and its relation to the type actions is controlled. In practice, it is f und desirable that the engagement of the trons of the lever 8 should V ly previous to the arrival of the l at the printing position, or just pier} the tii'n'e that the hey lever is arin its downward movement by the pod 21 and before the lovers '2' and 8 move out of contact. The object of this is to sure that the downward n'iovement of the un versal bar s/iall be started by the energy of rheoperatoi."s finger rather than depend entirely upon the momentum obtained by the momentum accumulatoii', This feature is liov ver optional and in some of it may be desirable not to start tn-e nniv rsal bar until the ey lever has been brou 'ht to .rceo It is suliiciont to state that sat actory lllllfifil'slll bar n'iovements can be secured in this marine 7 but possibly at The seltloc adjusting nut 52 can be manipulated by hand, and requires t 1e use of no special tools, so that the mechanisn'i may be changed from one. adjustment to anotl'ier .at a monient s notice, as desired.

At the opposite end. of the connecting rod 4? is positioned a second adjusting nut 56 similar in size and cmistrnction to the nut 53. This not forms one abutment for a return spring 57", the opposite end of which bears against a collar 58 adjacent a trans verse supporting member 60 through which the connecting iiod 47 passes. This spring acts not only to return the universal bar to normal upward position, but also to return the escapelnent rocker to norn'ial position and. to assist, through the universal bar, in the return of the type actions to normal position. The tension oi? this spring is adjusted by the look not 56 without, however, in any way a-I'l'ecting the timing of the escapcmcnt mechanism.

The escapenicnt lllQOlHll'llSlll herein used is proton-a. ly that type known as reverse escapenxcnt, that is, an escapen'ient in which the carriage stands normally at rest with the teeth of the escapemcnt wheel bearing against the fixed dog instead of the movable (log carried by the cscapcment rocker. ll-y using a, reverse cscapement it is necessary, due to its rapidity of moven'icnt, that the t'in'iing" between the type action nd the escapemcnt through the miiversal bar should be extremely accurate and the universal bar inowen'icnlv very rapid, in order to avoid either double printing or double spacing. lin ctnal practice, in rapid operation the movable dog does not have sulliricnt interval of time to engage the cscapement wheel, the escapement wheel engaging only the fixul. dog, which passes rapidly out of the path of travel of one tooth and back to'normal position for engagement with the next tooth of the cscapcinei'it wheel, all of which nccessitates exceedingly rapid and very ccurate universal bar mechanism.

Jtially as follows: As any key lever 5, for

emmple is depressed to move the type carrier rearward into printing position, the lever 7 rocks upon the lever 8 to carry (he yoke or fork. 31 into engagement with the u )er ed e of the universal bar 30 and when the he lever is arrested b on a ement between the stop 20 and pad .21 the universal bar will have been only very slightly actuated or moved to the position shown in Fig. 2, in which position it will be noted that the pivot point between-arm l6 and rod 47 is moved slightly toward the left. This movement is not sullicient under ordinary circumstances and adjustment to actuate the escapement mechanism, but merely to move it into a position where it will be instantly released as the type carrier conniletcs its printing operation. The type' during this operation moves from a position closely adjacent the platen into contact therewith under the action of the momentum accumulator 11 as fully set forth in the above referred to application, and instantly returns to the position clear of the platen and othe actions regardless of subsequent operations or releasing of the key. It is this movement from the ositi0n shown in Fig. to that shown in l ig. 3 and back again to that shown in Fig. 2 that completes the printing operation and ste'ps'the carriage through the escapement mechanism. In normal operation, of course, the key would be released immediately and another key depressed probably before the first key reached a position. of rest. In fact, it is unnecessary fol-the keys to return to normal position to effectively print and lso space the carriage, as both operations take place only during the final movement of the type.

A construction of this kind is particularly advantageous and important in the ease with which a s0;called dead key action may be used, that is, an action the operation of which is without subsequent universal bar movement. It is necessary or desirable sometimes, in printing certain characters in foreign. languages,. to apply different accent marks over the same letter in different words. To accomplish this result all that is necessary is to remove from a type action devoted to accent I ,c the yoke or fork streddlingthe' universal barainl the operation ofthat type action will then be unaccompanied by universal bar and escapr-ment movement.

From the above description it will be seen that the present invention embodies a simple and practical universal bar mechanism permitting rapid and efficient operation of the machine, nd is fully designed to accomplish, among others, all of the objects and advantages above set forth.

As many changes could be made in the above construction and many apparently widely-different embodiments ,of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in-the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

' Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a typewriting machine, in combination, a curved substantially vertically movable universal bar, a rock shaft, an escapement member, and connections between said bar and said shaft and between said shaft .-tion, a curved substantially vertically mov-- able universal bar, a rock shaft, an escapement member, and connections between said bar and said shaft and between said shaft and said escapement member comprising a plurality of links and an adjustable rod.

In a typewriting machine, in combination, a universal bar curved about a vertical axis, an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, a. member adapted tooperate said escapement dog and mounted to move transversely to said movement of the universal bar, and means whereby the movement of said bar'causes movement of said member.

.4. In a typewriting machine, in combination, a universal b-ar having downwardly extending legs, an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, a member adapted to operate said escapement do and mounted to move transversely to send movement of the universal bar, and means whereby the movement of said bar causes movement of said member.

5. In a typewriting machine, in combination, a curved universal bar at the front of the machine, an escapement dog in the rear 6. In a typewriting machine, in combination, a universal bar curved about a vertical axis, an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, a member adapted to operate said escapement dog and mounted to move transversely to said movement of the universal'bar, a spring urging said member in one direction, and means whereby the movement of said bar causes movement of said member.

7. In a typewriting machine, in combination, a curved universal bar, an escapement dog, means adapted to support said bar pivotally and permit movement thereof in a predetermined direction, a member adapted to operate said escapement dog and mounted to move transversely to said movement of the universal bar, a spring urging saidmenber in one direction, and means Whereby the movement of said bar causes movement of said member.

8. In a typewriting machine, in combination, a universal bar,'an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, a. member adapted to ope ate said escapement do and mounted to move trans versely to sai movement of the universal bar, a spring surrounding said member having portions bearing respectively against memberand the frame of the machine to urge the member in the direction of its length, and means whereby the movement of said bar causes movement of said member.

9. In a typewriting machine, in co1nbination, a curved universal bar, an escapement dog, means adapted to support said bar pivotally and permit movement thereof in apredetermined direction, a member adapted to operate said escapement do and mounted to move transversely to said movement of the universal bar, a spring surrounding said member having portions bearing re spectively against said member and the frame of the machine to urge the member in the direction of its length, and means whereby the movement of said bar causes movement of said member.

10. In a typewriting machine, in combination, a universal bar curved about a vertical axis, an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, a member adapted to operate said escapement dog and mounted to move'transverse'l y to said movement of the universal bar, and means comprising a rock shaft and connections between said bar and said member whereby the movement of said bar causes movement of said -1nember.

'11. In a typewriting machine, in combination, a curved universal bar, an escape ment dog, means adapted to support said bar and permit movement thereof in a vertical direction, a member adapted to operate said escapement dog and mounted to move transversely to said movement of the universal bar, and means comprising a rock shaft and connections between said bar and said member whereby the movement of said bar causes movement of said member.

12. In a typewriting machine, in combination, a curved universal bar having an escapement dog, means adapted to support said bar pivotally and permit movement thereof in a predetermined direction, a member adapted to operate said escapement dog and mounted to move transversely to said movement of the universal bar, a spring surrounding said member having portions bearing respectively against said member and the frame of the machine to. urge the member in the direction of its length, and means whereby the movement of said bar causes movement of said member.

13. In a typewriting machine, in combination, a curved universal bat, an escapement dog, means adaptedto support said bar and permit movement'thereof in a predetermined direction, a member adapted to operate said escapement dog and mounted to move transversely to said movement of the universal bar, means whereby said bar may be adjusted in the direction of its movement, and meanswhereby the movement of said bar causes movement of said member.

14. In a typewriting machine, in combi nation, a curved universal bar, an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, a member adapted to operate said escapement dog and mounted to move transversely-to said movement of the universal bar, means whereby said member may be adjusted to vary the position of said escapement dog, and means whereby the movement of said bar causes movement of said member.

15. In a typewriting machine, in combina tion, a curved universal bar, an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, a member adapted to operate said escapement dog and mounted to move transversely to said-movement of the unlversal bar, means whereby said bar and said dog may be adjusted conjointly, and means whereby the movement of said bar causes movement of said member.

16. In a typewriting machine, in combination, a curved universal bar, an escapement do ans adapted to support said bar and movement thereof in a predetermined direction, a member adapted to oper ate said eseapement dog and mounted to move transversely to said movement of the universal bar, means whereby said member beadjusted independently of said univsrsal bar to vary the position of said 'eseapement dog, and means whereby the movement of said bar causes movement of said member.

17. In a typewriting machine in combi nation, a universal bar curved about a vertical axis, an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, a member adapted to operate said eseapement dog and mounted to move transversely to said movement. of the universal bar, a spring urging said member in one direction, means whereby the tension of said spring may be adjusted, and means whereby the movement of said bar causes movement of said member.

18. In a typewriting machine, in combination, a universal bar curved about a ver tical axis, an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, a member adapted to operate said escapement dog and mounted to move transversely to said movement of the universal bar, a spring urging-said member in one direction, means whereby the tension of said sprin may be adjusted and locked automatically 1n adjusted position, and means whereby the movement'of said bar causes movement of said member. i

19. In a typewriting machine, in combination, a universal bar curved about a vertical axis, an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, a member adapted to operate said escapement dog and mounted to move transversely to said move ment of the universal bar, a spring urging said member in one direction, means Whereby the tension of said spring may be adjusted, means independent; of said lastmeans whereby the universal bar may be adjusted in its direction of movement, and means whereby the movement of said bar causes movement of said member.

20. In a typewriting machine, in combination, a universal bar curved about a vertical axis, an escapement dog, means adapted to support said bar and permit movement thereof in a predetermined direction, I

nation, a U-shaped universal bar, and two sets of levers for controlling the movement of said universal bar 22. In a typewritmg maehina in combination, a universal bar, a set of levers supporting said bar for insuring a vertical movement of all' partsthereof, and a second .set of levers substantially parallel to saidfirst set of levers with a position therebelow for assuring parallel movement.

23. In a typewriting machine, in combination, a universal bar, a set of levers supporting said bar for insuring a vertical movement of all parts'thereof, a second. set of levers substantially parallel to said first set of levers with a position therebelow for assuring parallel movement, an escapement mechanism, and connections between the said escapement mechanism and said set of levers.

24. In a typewriting machine, in combination, a curved universal bar, parallel arms connected to different points of said universal bar having the same swinging radius whereby the universal bar moves in a substantially vertical direction, and a set of levers pivotally connected with the lower .part of said universal bar.

escapement mechanism, an operative conconnections between the rockshaft and the universal bar, connections including a longitudinally movable member between said escapement mechanism and said rock shaft, and a coil spring positioned about said member between the escapement mechanism and rock shaft.

28. In a typewriting machine, in combination, a universal bar, a rock shaft connected therewith, anescapement mechai ism, connections between the rock shaft and the universal bar, connections including a longitudinally movable member between said escapement mechanism and said rock shaft, a coil spring positioned about said member between the escapement mechanism and rock shaft, and means for adjusting the tension of said spring comprising an adj usting nut movable in the direction of the length of the part on which it is mounted.

In testimony whereof I affix my signature, in the presence of two witnesses.

NILS H. ANDERSON.

Witnesses:

ALBERT H. GRISWOLD, JESSIE M. Ansor. 

